Hello I'm On Penicillin The Antibiotics I Have Strep Throat,

Hello I'm on penicillin the antibiotics I have strep throat, I got my prescription late delivered to my home I was Supossed to start them today by taking 2 at breakfast 2 at bedtime they're to be 12 hrs apart but I took 4 all at once it's 300 mg per pill I'm starting to feel really drowsy,wanting to vomit,chest pains. I'm just really freaking out please help